package com.sunch.utils;

import com.sunch.pojo.User;
import com.sunch.properties.JwtProperties;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

@Component
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            log.info("-------------->");
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        log.info("拦截成功");
        //1.从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());

        //2.校验令牌
        try {
            log.info("jwt校验:{}",token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get("userId").toString());
            User user = new User();
            user.setId(Math.toIntExact(userId));
            log.info("当前用户id:{}",userId);
            //存储当前登陆账号的id值
            UserHolder.saveUser(user);
            //3、通过，放行
            return true;
        }catch (Exception e){
            response.setStatus(401);
            return false;
        }
    }
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,  Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }
}
